Machine for sharpening wheat-grinding rolls



(No Model.)

T.-W. SMITH. MACHINE FOR SHARPENING WHEAT GRINDING ROLLS. No. 588,496. Patented Aug. 17,1897.

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UNITEDSTATES FFICE.

PATENT MACHINE FOR SHARPENING WHEAT-GRINDING ROLLS.

SPECIFICATION forming part of Letters Patent No. 588,496, dated August 17,1897.

Application filed August'lo, 1896. fierial No. 602,353. (No model.)

parts hereinafter shown, described, and

claimed.

Figure 1 is a front elevation of my improved machine for grinding rollers. Fig.2 is a transverse vertical sectional view on the line 2 2 of Fig. 1. Fig. 3 is a plan View of the mechanism seen looking in the direction indicated by the arrow 3 in Fig. 1. Fig. 4 is a View in elevation of the shifting mechanism which I employ as seen looking'in the direction as indicated by the arrow4 in Fig. 3. Fig; 5 is an end view of a collar of which I make use. Fig. 6 is a longitudinal sectional view of the collar shown in Fig. 5 with the end of the shaft inserted therein. Fig. 7 is a transverse sectional view on the line 7 7 of Fig. 3.

In the construction of my improved grinding-machine I employ a base consisting of the inverted channel-bars 10 and 11, framed together by the cross-bars 12. The posts 13 and 14 are mounted uponthe cross-bars l2, and at the upper ends of said posts 13 and 14 are the open bearings 15 and 16,1'espectively, mounted in horizontal alinement with each other. The post 17 is mounted upon the channel-bars 10 and 11, and formed integral with the upper end of said post is the lower half 18 of a bearing 19, which bearing is in alinement with the bearings 15 and 16. The upper half 20 of the bearing 19' is secured to the lower half 18 of said bearing by means of the bolts 21, passing through the lips 22. i

A collar 23, having the square opening 24 extending from end to end thereof,is rotatably mounted in the bearing 19, and the sprocketwheel 25 is lifted to one end of said collar, While the smaller sprocket-wheel 26 is fixed to 50 the o'pposite'end of said collar.

The shaft 27 has one of its ends 28 mounted within the opening 24 in the collar 23. The end 28 of the shaft 27 is square in cross-section, and at its longitudinal center it fits closely within the opening 24. The round part of the shaft 27 is considerably smaller thanthe opening 24, and the square end 28 of said shaft tapers both ways from its center, thus forming a tumbling-rod joint between the said shaft 27 and said collar 23.

A knuckle-joint 29 is attached'to the end of the shaft 27 opposite the square end 28 and outside of the collar 23.

The roll 30 to be ground is mounted upon the shaft 31, which shaft is mounted in the bearings 15 and 16, and one end of said shaft 31 is inserted in' the end of the knuckle-joint 29 opposite the end which is attached to the shaft'27, and is held in position by the setscrews 32. Power communicated to the sprocket-wheel 25 from the prime mover will cause the roll 30 to rotate.

A plate 33 in the form of a channel-bar is inserted between the channel-bars 10 and 11, as shown in section in Fig. 2 and in the position indicated by the dotted line 33 in Fig. 1, and said plate is held securely in position by means of the bolts or rivets 34.

Projecting forwardly in horizontal alinement with each other from the posts 13 and 14 are arms forming the split bearings 35 and 36. A post 37 projects upwardly from the plate 33 and a split bearing 38, formed at its upper end in alinement with the bearings 35 and 36, andthe shaft 39 is rotatably mounted in said bearings 35, 36, and 38. wheel 40 is loosely mounted upon the shaft 39 adjacent to the bearing 38 and in alinement with the sprocket-wheel 26. On the inner end of the hubof the sprocket-wheel 40 is a collar 41, having the ratchet-teeth 42 formed on its free end. A collar 43 is adjustably mounted upon the shaft 39 adjacent to the bearing 36, and a spur-gear 44 is loosely mounted upon said shaft 39,with its hub abutting the collar 43.

A collar 45 is attached to. the hub of the gear 44-upon the side of said gear opposite the collar 43, and said collar. 45,has ratchetteeth 46 upon its free end. The portion 47 of the shaft 39 which is between the bearings 35 and 36 is screw-threaded. A collar 48 is A sprocketmounted upon the shaft 39 between the collars 41 and45. A collar 48 is mounted for endwise motion, and a feather or key 49, fixed to the shaft 39, as shown in Fig. 7, prevent-s said collar from rotating upon said shaft. Upon one end of the collar 48 are ratchet-teeth 50, designed to engage the ratchet-teeth 42 upon the collar 41, and upon the opposite end of said collar 48 are ratchet-teeth 51, designed to engage the ratchet-teeth 46 upon the end of the collar 45. In the center of the collar 48 is an annular groove A hearing 53 is mounted upon the channelbar 10, and a similar bearing 54 is mounted upon the plate 33 in horizontal alinement with said bearing 53,and a rock-shaft 55 is mounted in said bearings 53 and 51- transversely of and under the shaft 39.

Arms 56 and 57 are rigidly mounted upon the shaft 55 and project outwardly on opposite sides of the collar 48. The segmental clasps 58 and 59 are pivotally attached to the upper ends of the arms 56 and 57, respectively, by means of the pins 60 and 61, and said clasps engage opposite sides of the collar 48 and in the groove 52.

The triangular arm (32 is rigidly mounted upon the shaft 55 and projects upwardly therefrom, and the pins 03 and 64 are fixed in the upper end of said arm. A collar 65 is loosely mounted upon the shaft 55 and adjacent to the arm 02, and a lever 60 is rigidly attached to said collar and projects upwardly therefrom between the pins 63 and 64. A weight 67 is slidingly mounted upon the upper end of the lever (36 and is held in position by means of the set-screw 68. The vibration of the lever 60, engaging the pin 63 or 64, as the case may be, will operate the collar 48 endwise upon the shaft 39 as required to disengage the teeth 50 from the teeth 42 and engage the teeth 51 with the teeth 46, and vice versa.

Upon the rear side of the post 14 is a split bearing 69, and a similar bearing 70 is mounted upon the plate and in horizontal and longitudinal alinement with said bearing 09. The shaft 71 is mounted in said bearings 69 and '70 in a position parallel with the shaft 39. A sprocket-wheel 72 is rigidly mounted upon said shaft 71 adjacent to the bearing 70 and in alinement with the sprocket-wheels 20 and 40. A chain 73 travels around said wheels 26, 40, and 72. A spur-gear 74 is mounted rigidly upon the shaft 71 and in mesh with the spur-gear 44 upon the shaft 39.

Blocks 75 and 76 are mounted upon the cross-bars 12 in front of the posts 12 and 13, and the track-bar 77 is mounted upon said blocks 75 and 76 and in a position parallel with the shaft 39.

The base 78 of the emery-stand is slidingly mounted upon the track-bar 77, as shown in Fig. 2. The post 79 supporting the emerywheel is pivotally connected to the base 78 by means of the pin 80. An elbow-shaped arm 81 has its lower end attached to the post pulley and drives the belt 88.

projects upwardly from the base 78 in front 79, and at the upper end of the post 79 is a bearing 2, and at the upper end of the arm 81 is a similar bearing 83, said bearings 82 and 83 being in horizontal alinement and in a position parallel with the shaft 39.

The emery-wheel shaft 84 is mounted in said bearings 82, and the emery-wheel 85 is mounted upon said shaft and between said bearings. The belt-pulley 86 is fixed to said shaft 84, adjacent to and outside of the bearing 82.

The forked arm 87 is attached to the upper end of the post 79, and the belt 88, running upon the pulley 86,0peratcs between the forks at the upper end of said arm 87. A countershaft 89 is mounted above the machine and carries the drum 90, which drum acts as a The post 91 of the post 79, and a block 92 is pivotally mounted in the upper end of said post. A screw 93 operates in the screw-threaded aperture through the block 92, and said screw is operated by the hand-wheel 9-1, attached to its outer end.

In the lug 95, projecting forwardly from the post 79, is formed a ball-and-soeket connection between the post 79 and the inner end of the screw 93.

By the operation of the hand-wheel 9-1 the position of the post 79 may be changed relative to the vertical as required to control the position of the emery-wheel relative to the roll to be ground.

An arm projects baekwardly from the base 78 and carries upon its free end a block having a screw-threaded aperture in which the screw-threaded portion 47 of the shaft 39 operates.

The posts 98 and 99 are mounted upon the ends of the cross-bars 12, and in the upper ends of said posts are the bearings 100 and 101, and a shifting bar 102 is slidingly mounted in said bearings. At one endof said bar 102 is an eye 103, which eye engages the pin 104, at tached to the lever 66 and near its lower end. Collars 105 and 106 are adjustably mounted upon the bar 102, between the bearings 100 and 101, and are held in position by means of the set-screws 107 and 108.

The lug 109 projects forwardly from the base 78 and has an aperture through which the bar 102 operates. The collars 105 and 106 are on opposite sides of the lug 109.

The sprocket-wheel 40 and the gear-wheel 44 being loosely mounted on the shaft 39 will travel in opposite directions, and the direction in which the shaft 39 rotates will depend upon whether it is being driven by the sprocket-wheel 40 or by the gear 44. The rotation of the shaft 39 will cause the base 78 to slide upon the track-bar 77 by the operation of the screw 47 in the arm 96. Reversing the motion of the shaft 39 by means of the lever 66 operating the collar 48 will reverse the direction of travel of the base 78. The distance traveled in either direction by said base 78 is regulated by adjusting the collars 105 and 106 upon the shifting bar 102, which operates the lever 66. The lever 66 is operated by the lug 109 striking against either the collar 105 or 106, as the case may be, and thus moving'the shifting bar 102 endwise.- As the base 78 travels up and down'the track-bar 77 the emerywheel is carried with it, and the belt 88, driving the emery-wheel, is held in position upon the pulley 86 by means of the forked arm 87. Said belt 88 travels up and down the drum 90, as required to keep said belt in alinement with said pulley 86, which pulley travels with the emery-stand carried by the base 78.

The 'roll to be ground is slowly rotated in the direction opposite to the direction in which the emery wheel rotates, and the emerywheel, traveling from one end to the other of the roll, will grind all parts of the periphery of said roll alike.

I claim 1. In a roll-grinder, the combination with a base, said base consisting of the inverted channel-bars and 11 framed together by the cross-bars 12, of the posts 13 and 14:.

mounted upon the cross-bars 12 and having the open bearings 15 and 16, respectively, in their upper ends and in horizontal alinement with each other, the post 17 mounted upon the channel-bars 10 and 11 and having the bearing 19 at its upper end and in horizontal alinement with the bearings 15 and 16, the collar 23, having the square opening 24 extendingfrom end to end, rotatably mounted in said bearing 19, the sprocket-wheel 25 fixed to one end of said collar, the sprocketwheel 26 fixed to the opposite end of said collar, the shaft 27 having one of its ends slidingly mounted in the opening 24 in said collar 23, the knuckle-joint 29 carried by the end of said shaft 27 opposite the end which is inserted in the collar 23, the shaft 31 mounted in the open bearings 15 and 16 and connected to the knuckle-joint 29, and means of driving .the sprocket-wheel 25, substantially as specified.

2. In a roll-grinder, a track-bar 7 7 mounted in position parallel with the axis of the roll,

bearings 82 and 83 and carrying an emerywheel, the pulley 86 fixed upon said shaft, means of driving said pulley, and means of reciprocating said stand; which means consists of an arm attached to the base of said stand, a screw operating in the screw-threaded opening through said arm, and means of operating said screw, substantially as specified.

3. In a roll-grinder, a stand mounted for reciprocation, a grinding-wheel carried by said stand, means of adjusting said stand in a line crosswise of the line of reciprocation; which means consists of a pivotal connection between the base of said stand and the frame supporting the grinding-wheel, the post 91 projecting upwardly from said base, the block 92 pivotally mounted in the upper end of said post, the screw 93 operating in the screwthreaded aperture through the block 92, the hand-wheel 94 for operating-said screw, and a ball-and-socket connection between the end of said screw and the frame supporting said grinding-wheel, means of reciprocating said stand, and means of rotating said wheel, substantially as specified.

In testimony whereof I afiEiX my signature in presence of two witnesses.

THOMAS W. SMITH. Witnesses.

O. K. J ONES, MAUD GRIFFIN. 

